Math: fixed debug output operator for Deg and Rad.

It was currently not possible to print this, as the resulting type is
neither Deg nor Rad:

    Debug() << 23.0_degf - 5.0_degf;

src/Math/Angle.cpp

@@ -18,11 +18,11 @@
 namespace Magnum { namespace Math {
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
-template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Rad<float>&);
-template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Deg<float>&);
+template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Unit<Rad, float>&);
+template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Unit<Deg, float>&);
 #ifndef MAGNUM_TARGET_GLES
-template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Rad<double>&);
-template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Deg<double>&);
+template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Unit<Rad, double>&);
+template Corrade::Utility::Debug operator<<(Corrade::Utility::Debug, const Unit<Deg, double>&);
 #endif
 #endif
 

src/Math/Angle.h

@@ -219,7 +219,7 @@ template<class T> inline constexpr Deg<T>::Deg(Unit<Rad, T> value): Unit<Deg, T>
 template<class T> inline constexpr Rad<T>::Rad(Unit<Deg, T> value): Unit<Rad, T>(T(value)*Math::Constants<T>::pi()/T(180)) {}
 
 /** @debugoperator{Magnum::Math::Rad} */
-template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const Rad<T>& value) {
+template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const Unit<Rad, T>& value) {
     debug << "Rad(";
     debug.setFlag(Corrade::Utility::Debug::SpaceAfterEachValue, false);
     debug << T(value) << ")";
@@ -228,7 +228,7 @@ template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug deb
 }
 
 /** @debugoperator{Magnum::Math::Deg} */
-template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const Deg<T>& value) {
+template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const Unit<Deg, T>& value) {
     debug << "Deg(";
     debug.setFlag(Corrade::Utility::Debug::SpaceAfterEachValue, false);
     debug << T(value) << ")";
@@ -238,11 +238,11 @@ template<class T> Corrade::Utility::Debug operator<<(Corrade::Utility::Debug deb
 
 /* Explicit instantiation for commonly used types */
 #ifndef DOXYGEN_GENERATING_OUTPUT
-extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Rad<float>&);
-extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Deg<float>&);
+extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Unit<Rad, float>&);
+extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Unit<Deg, float>&);
 #ifndef MAGNUM_TARGET_GLES
-extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Rad<double>&);
-extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Deg<double>&);
+extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Unit<Rad, double>&);
+extern template Corrade::Utility::Debug MAGNUM_EXPORT operator<<(Corrade::Utility::Debug, const Unit<Deg, double>&);
 #endif
 #endif
 

src/Math/Test/AngleTest.cpp

@@ -92,22 +92,32 @@ void AngleTest::conversion() {
     constexpr Deg a(Rad(1.57079633f));
     CORRADE_COMPARE(float(a), 90.0f);
 
-    constexpr Rad b(Deg(90.0));
+    constexpr Rad b(Deg(90.0f));
     CORRADE_COMPARE(float(b), 1.57079633f);
 }
 
 void AngleTest::debugDeg() {
     std::ostringstream o;
 
-    Debug(&o) << Deg(90.0);
+    Debug(&o) << Deg(90.0f);
     CORRADE_COMPARE(o.str(), "Deg(90)\n");
+
+    /* Verify that this compiles */
+    o.str({});
+    Debug(&o) << Deg(56.0f) - Deg(34.0f);
+    CORRADE_COMPARE(o.str(), "Deg(22)\n");
 }
 
 void AngleTest::debugRad() {
     std::ostringstream o;
 
-    Debug(&o) << Rad(1.5708);
+    Debug(&o) << Rad(1.5708f);
     CORRADE_COMPARE(o.str(), "Rad(1.5708)\n");
+
+    /* Verify that this compiles */
+    o.str({});
+    Debug(&o) << Rad(1.5708f) - Rad(3.1416f);
+    CORRADE_COMPARE(o.str(), "Rad(-1.5708)\n");
 }
 
 }}}